A hostage situation took place after an alleged knifeman targeted a petrol station, with shots reportedly fired.
Police attempted to calm the offender as staff at the Esso garage on Hengrove Way, Bristol were forced to hide in a safe room, according to the Mirror.
The incident occurred on Thursday morning with officers from Avon and Somerset Constabulary attending the scene.
It is understood a negotiator was “deployed” and one person was taken away with injuries.
A further update said a man had been “detained”.
A police statement said: “Police are at the scene of an incident which has led to the closure of Hengrove Way, Bristol today, Thursday 9 September.
“A man armed with a knife is inside the shop of the petrol station. Staff members are uninjured within a safe room and in contact with officers.
“One person has left the scene and gone to hospital with injuries not believed life-threatening.
“Armed officers and a negotiator have been deployed to try to bring the incident to a safe conclusion.
“Members of the public are urged to avoid the area.”
A later statement added: “We have detained a man in connection with an incident at a petrol station on Hengrove Way this morning. Investigations at the scene continue.”
Local buses were delayed due to the ongoing incident, according to bus operator First West of England.
The affected services were due to exit the Hengrove depot, in the south of the city.
The cancelled services were due to resume once the police incident had been dealt with.
First West of England said on Twitter : “POLICE INCIDENT – All services that operate out of Hengrove depot are currently unable to do so due to a nearby police incident.
“Delays to services as a result. Will update when able.”
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